725332240 has 20 divisors (see below), whose sum is σ = 1686397644. Its totient is φ = 290132864.

The previous prime is 725332199. The next prime is 725332249. The reversal of 725332240 is 42233527.

It can be written as a sum of positive squares in 2 ways, for example, as 285339664 + 439992576 = 16892^2 + 20976^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×725332240² = 1052213716766835200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 725332199 and 725332208.

It is not an unprimeable number, because it can be changed into a prime (725332249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4533247 + ... + 4533406.

Almost surely, 2^725332240 is an apocalyptic number.

It is an amenable number.

725332240 is an abundant number, since it is smaller than the sum of its proper divisors (961065404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

725332240 is a wasteful number, since it uses less digits than its factorization.

725332240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9066666 (or 9066660 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 725332240 is about 26931.9928709333. The cubic root of 725332240 is about 898.4880953274.

Adding to 725332240 its reverse (42233527), we get a palindrome (767565767).

It can be divided in two parts, 7253 and 32240, that added together give a palindrome (39493).

The spelling of 725332240 in words is "seven hundred twenty-five million, three hundred thirty-two thousand, two hundred forty".